A00 File

What are A00 files and how to open them

Are you having problems opening an A00 file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your A00 files.

What is an A00 file?

Files that contain the .a00 file extension are commonly used by the ARJ and ALZip file compression utilities. These software applications take batches of files and compress the files into a single archive file.

Once these applications have created an archive file, that file can then be split into smaller volumes. This makes it easier for a user to transmit the files online or to store the archive file across multiple storage disks.

When an archive file is split, each volume of the archive is given its own file extension, usually in sequence. The .a00 file extension is normally given to the first volume of the split archive file.

If a user wishes to retrieve the contents of the split archive, all of the volumes of the archive file must be present.

How to open A00 files

Important: Different programs may use files with the A00 file extension for different purposes, so unless you are sure which format your A00 file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested six different A00 openers which you will find listed below.

Last updated: December 22, 2023

Various apps that use files with this extension

These apps are known to open certain types of A00 files. Remember, different programs may use A00 files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about A00 file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.